The air bubble in the prefilter is normal, and as I understand it, squeaking in the hand pump is a sign that you've got things pressurized and are moving fluid.

If it runs, then you're good to go!

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1983 300td 240k (down with bad tranny)
1984 300d 222k (daily driver) "Olive"
1997 GMC K2500 105k (sled dog limo)

"The scenery in ANWR is as spectacular as the Grand Canyon and the wildlife is more impressive."